Fasteners and Hardware — FAQ
What's the difference between undermount and side mount drawer slides?
Undermount slides attach beneath the drawer box and are completely hidden when installed, requiring specific drawer bottom clearance (typically 1/2 inch). Side mount slides attach to drawer sides and cabinet walls, remaining visible but offering easier installation and adjustment. Undermount provides cleaner aesthetics and full drawer width utilization, while side mount is more forgiving of slightly out-of-square drawers.
How much weight can Liberty drawer slides support?
Liberty drawer slides range from 50-pound capacity for basic bottom-mount models to 100+ pounds for heavy-duty ball bearing versions. The D80616C-ZP-W series handles 75 pounds, while the 941405 soft-close model supports 75 pounds with smooth operation. Always check the specific model rating and distribute weight evenly—concentrated loads in drawer fronts can cause premature failure even below rated capacity.
Can I retrofit soft-close slides to existing cabinets?
Yes, but compatibility depends on your current drawer construction. Undermount soft-close slides require 1/2-inch bottom clearance and specific side clearance (typically 3/8 inch). Side-mount retrofit is easier but leaves visible hardware. Measure your drawer box dimensions carefully—height, width, and depth must match new slide specifications. You may need to rebuild drawers or add blocking for proper fit.
What tools do I need to install undermount drawer slides?
How do I measure for replacement drawer slides?
Measure the closed drawer length from front to back—this is your slide length. Check side clearance by measuring the space between drawer side and cabinet wall (typically 1/2 inch for side mount). For undermount, measure bottom clearance from drawer bottom to cabinet floor. Note your current mounting style (side, under, or bottom) and choose replacements with identical specifications to avoid cabinet modifications.
Why are my undermount drawer slides making noise?
Noise indicates worn plastic rollers, dry bearings, or misalignment. First, clean tracks with compressed air and apply dry silicone lubricant—never use oil-based products that attract dust. Check that locking devices are fully engaged and drawer boxes haven't shifted. If noise persists after lubrication, the soft-close damper may be failing or ball bearings could be damaged, requiring slide replacement.
